CAS Key Laboratory of Economic Stratigraphy and Paleogeography, Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and Paleoenvironment, Chinese Academy of Sciences, Nanjing, China.
Departamento de Geociencias, Universidad de Vigo, Vigo, Spain.
Elife. 2018 Dec 18;7:e38827. doi: 10.7554/eLife.38827.
The origin of angiosperms has been a long-standing botanical debate. The great diversity of angiosperms in the Early Cretaceous makes the Jurassic a promising period in which to anticipate the origins of the angiosperms. Here, based on observations of 264 specimens of 198 individual flowers preserved on 34 slabs in various states and orientations, from the South Xiangshan Formation (Early Jurassic) of China, we describe a fossil flower, gen. et sp. nov.. The large number of specimens and various preservations allow for an evidence-based reconstruction of the flower. From the evidence of the combination of an invaginated receptacle and ovarian roof, we infer that the seeds of were completely enclosed. Evidence of an actinomorphic flower with a dendroid style, cup-form receptacle, and angiospermy, is consistent with being a angiosperm from the Jurassic, an inference that we hope will re-invigorate research into angiosperm origins.
被子植物的起源一直是植物学界争论的焦点。早白垩世被子植物的多样性使得侏罗纪成为一个很有希望的时期，可以期待被子植物的起源。在这里，基于对中国南象山组（早侏罗世）的 34 块石板上保存的 264 个标本、198 个个体花的观察，我们描述了一个化石花，属和种新。大量的标本和各种保存状态使得对花的重建成为可能。从凹陷的花托和子房盖的组合的证据推断，我们推断的种子是完全封闭的。具有辐射对称花、树枝状花柱、杯状花托和被子植物的证据，与侏罗纪的被子植物是一种被子植物一致，我们希望这一推断将重新激发对被子植物起源的研究。
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